ML20069H603

Environ Radiological Monitoring Rept,1982

ML20069H603
Person / Time
Site:	Brunswick
Issue date:	03/15/1983
From:	Pasteur R, Shearin R, Warriner G CAROLINA POWER & LIGHT CO.
To:
Shared Package
ML20069H584	List: BSEP-83-1027, Forwards Environ Radiological Monitoring Rept,1982 ML20069H603
References
NUDOCS 8304060267
Download: ML20069H603 (57)

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...

Shearon Harris Energy & Environmental Center Carolina Power & Light Company New Hill, North Carolina ENVIRONMENTAL RADIOLOGICAL MONITORING REPORT FOR BRUNSWICK STEAM ELECTRIC PtANT JANUARY 1, 1982, THROUGH DECEMBER 31, 1982 Prepared By:

,. N s cw C s ca % - a U Roger D. Pasteur Senior Specialist - Environmental Reviewed By:

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Ron L. Shearin Project Specialist - Environmental Approved By:

,/ -

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CLt W George H. Llarriner Principal Specialist - Environnental March 15, 1983 8304060267 830330 PDR ADOCK 05000324 g PDR

- - .___- . . _ _ _ . _ - = _ _ _ _ _ _ _ _ .

TABLE OF CONTENTS Page LIST OF FIGURES................................................... 11 LIST OF TABLES.................................................... iii 1.0 INTR 000CTION................................................. 1-1 1.1 Plant and Location..................................... 1-1 1.2 En /i ronmental Monitori ng Program. . . . . . . . . . . . . . . . . . . . . . . 1-2 2.0 PROGRAM

SUMMARY

.............................................. 2-1 3.0 INTERPRETATIONS AND CONCLUSIONS.............................. 3-1 3.1 A i r S a mp l e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.2 M i l k S a mp l e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 3.3 Vegetation............................................. 3-12 3.4 Soi1................................................... 3-14 3.5 Surface Water.......................................... 3-14 3.6 Fish................................................... 3-16 3.7 Shrimp , Benthi c Organi s cs, .,and 0ysters . . . . . . . . . . . . . . . . . 3-17 3.8 Bottom Sediment, Aquatic Vegatation.................... 3-17 3.9 Groundwater............................................ 3-18 3.10 Zooplankton............................................ 3-18 3.11 External Radiation Dose................................ 3-19 3.12 S u mm a ry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19 4.0 MISSED SAMPLES AND ANALYSES.................................. 4-1 4.1 Aquatic Vegetation..................................... 4-1 4.2 Fodder and Feed........................................ 4-1 4.3 Milk................................................... 4-1 4.4 External Rad,tation (TL9)............................... 4-1 l .5.0 ANALYTICAL PROCEDURES........................................ 5-1 5.1 Gross Beta............................................. 5-1 5.2 Tritium....................;........................... 5-1 5.3 Iodine-131............................................. 5-2

, 5.4 Strontium-89. 90....................................... 5-2 5.5 Gamma Spect romet ry Ge (Li ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 5.6 Th ermol umines cent Dosi met ry . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 6

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l LIST OF FIGURES Figure Title Pace 1.1 Locations of BSEP Radiologi cal Envi ronmental .... ... . .. 1-8 Monitoring Stations -

1-2 Locations of BSEP Radiological Environmental ........... 1-9 Monitoring Stations 1-3 Sketch Map of Landfill Area Showing Locations.......... 1-10 of Monitor Well Sites 1-4 Detailed Section - Monitor Well Site................... 1-11 3-1 Plot of Sample Station 02 Activity Versus Date......... 3-3 and Control Station Activity Versus Date 3-2 Plot of Sample Station 05 Activity Versus Date......... 3-4 and Control Station Activity Versus Date 3-3 Plot of Sample Station 18 Activity Versus Date......... 3-5 and Control Station Activity Versus Date 3-4 Plot of Sample Station 23 Activity Versus Date......... 3-6 and Control Station Activity Versus Date 3-5 Plot of Sample Station 24 Activity Versus Date......... 3-7 and Control Station Activity Versus Date 3-6 Plot of Sample Station 45 Activity Versus Date......... 3-8 and Control Station Activity Versus Date 3-7 Plot of Sample Station 74 Activity Versus Date......... 3-9 and Control Station Activity Versus Date 3-8 Plot of Sample Station 75 Activity Versus Date......... 3-10 and Control Station Activity Versus Date 3-9 Hi story of C s-137 at Mi lk S t ati on 35. . . . . . . . . . . . . . . . . . . 3-13 3-10 Plot of Sample Station 32 Activity (Discharge. ... . . . . . . 3-15 Canal) Versus Date and Control Station Activity (Intake Canal) Versus Date 11

- - - = .. ._.

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LIST OF TABLES Table Title Page 1-1 Environmental Radiological Mcqitoring Program..... . . ... 1-3 Brunswick Steam Electric Plar.t 2-1 Envi ronmental Radiological Monitoring Program..... . .... 2-3 j Summary l 3-1 Gross Beta Air Particulate Six-Month Averages for...... 3-2 Comparison of Preoperational Date to 1982 Data

+

3-2 Dose Available to Man Via Fish-Man Pathway............. 3-16 5-1 Typical Minimum Detectable Concentrations Ge(Li)....... 5-4 Ganna . Spectrometry 4

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1.0 INTRODUCTION

The following report summarizes the Environmental Radiological Moni-toring conducted for the Brunswick Steam Electric Plant during the calendar year 1982. This is the sixth year in which the program's '

sample analyses and data interpretation have been entirely performed by Carolina Power & Light Company.

1.1 Plant and Location l

The Brunswick Steam Electric Plant (BSEP) consists of two boiling water reactors which are designed to generate a total of 1,642 MW (net). Unit 2 first achieved criticality on March 21, 1975, and went into commercial production on November 3,1975. Unit 1 achieved criticality on November 22, 1976, and went into commercial produc-tion on March 18, 1977.

The BSEP is located in the southeastern corner of North Carolina, in Brunswick County, approximately 2.5 miles north of Southport. This location is near the mouth of the Cape Fear River, which is the source of condenser cooling water. Tha intake canal extends approx-imately three miles east of the plant to the Cape Fear River, and the discharge canal proceeds southwest and south for approximately I

six miles to the Atlantic Ocean. The discharge canal passes under the Intracoastal Waterway by inverted siphon, proceeds to a pumping basin at the shoreline, and is carried out into the aean by a 2,000-foot pipeline.

Elevation of the plant areas ranges from sea level to 30 feet (MSL),

and extensive swamps and marshes occur in the area. Beaches, within 20 miles of the plant, are a source of recreation. Fishing and boat ing are popular. Within 50 miles of the plant less than half

, the land is used for agriculture, as small truck, dairy, and poultry farms, producing crops, including corn, soybeans, and tobacco. Most of the iadustrial activity is in the Wilmington area (approximately 16 1-1 l

miles north of BSEP). Sunny Point Military Ocean Terminal is located approximately 4.5 miles north of BSEP and primarily transfers muni-tions, received by truck and rail, to ships. Pfizer Chemical Company is located 1.5 miles southeast of BSEP and is a manufacturer of l citric acid. It employs approximately 250-300 people. A ship channel in the Cape Fear River allows traffic to Wilmington, and the Atlantic Intracoastal Waterway intercepts the ship channel at Southport.

( 1.2 Environmental Monitoring Program The significant elements of the preoperational dose estimates were used to establish both the preoperational and operational surveil-lance programs. The program that evolved during preoperational surveillance and was subsequently incorporated into the Brunswick Environmental Technical Specifications is detailed in Table 1-1.

Figures 1-1 and 1-2 show the environmental monitoring locations.

Figures 1-3 and 1-4 relate to environmental monitoring requirements implemented in June 1980 that were commitments to the state of North Carolina in assessing the effect of an unplanned transfer of radio-activity to the Brunswick County Southport Landfill. The environmental monitoring program associated with these locations is a special program of limited duration and is not a part of the environmental surveillance designed to support the Brunswick Environmental Tech-l nical Specifications (Appendix B).

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, 1-2 l

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TABLE 1-1 ENVIRONMENTAL RADIOLOGICAL N)NITORING PROGRAM BRUNSWICK STEAM ELECTRIC PLANT Sangle Sampling Type Sampling @oint and Description Frequency Sample Size Sample Analysis Air 2-Information Center Weekly 10,000 cu. ft. Iodine Cartridge 5-Caswell Beach at Pump Station (300 cu. m.)

( AC ) 18-Southport Near CP&L Substation 22-Sutton Plant

• 23-Projected Maximum Annual Concentration Point - NE 24-CP&L Substation on Construction l

Access Road 45-On Site 74-Bethel Church Road 75-Stevens' Farm Vector (started 4-26-82) ,

l Air 2-Information Center Weekly 10,000 cu. ft. Weekly--Gross Beta

[ Quarterly--Composi t e-Particulate 5-Caswell Beach at Pump Station (300 cu. m.) ,

(AP) 18-Southport near CP&L Substation Gamma and Sr-89, 90 22-Sutton* ,

23-Projected Maximum Annual Concen- ,

tration Point - NE l 24-CP&L Substation on Construction l Access Road ,

45-On Site 74-Bethel Church Road 75-Stevens' Farm Vector (started 4-26-82)

Aquatic 29-Ocean - 0.5 Mile East of Semiannual 500 Grams Gamma and Sr-89, 90 Vegetation Discharge Outfall (AV) 30-Ocean Near Discharge Outfall i 31-Ocean - 0.5 Mile West of Discharge Outfall 42-Lower Cape Fear River Away From Plant Discharge *

• Control Station

TABLE 1-1 (Continued)

Sample Sampling Type Sampling Point and Description Frequency Sample Size Sample Analysis Benthic 29-Ocean - 0.5 Mile East of Semiannual 10 cc wet Ganna and Sr-89, 90 Organism Discharge Outfall (BO) 30-Ocean Near Discharge Outf all 31-Ocean - 0.5 Mile West of Discharge Outfall 42-Lower Cape Fear River Away From Plant Discharge

• Bottom 13-River Road at Intake Canal

• Semiannual 500 Grams Ganma and Sr-89, 90 1 Sediment 29-Ocean - 0.5 Mile East of (SD) Discharge Outfall 30-Ocean Near Discharge Outfall

[ 31-Ocean - 0.5 Mile West of I

Discharge Outfall 33-Discharge Canal at Stilling Pond 34-Discharge Canal Near the Plant Fish 30-Ocean Near Discharge Outfall Quarterly 500 Grams Gamma (FI) 43-Discharge Canal Fodder and 35-Stevens' Farm Monthly 500 Grams Gamma Feed (F0) 37-Johnson's Farm * (during growing season)

• Control Station

TABLE 1-1 (Continued)

Sample Sampling Type Sampling Point and Description Frequency Sample Size Sanple Analysis Food Crop 41-lii ghway 211 - 0.25 Mile Three Per Growing 500 Grams Gamma (FC) East of Hwy. 133 Season 47-Location Varies

• Groundwater 5-Caswell Beach at Pump Station Quarterly 2 Liters Gamma and Tritium (Gtl) 25-Southport*

26-ilighway 87 - West Side of Discharge Canal 27-Ilwy. 211 - West Side of Discharge Canal 28-BSEP - On Site - llell #1 35-Stevens' Farm Gamma T

53-69-Brunswick County Landfill **

70-73-BSEP Landfill ***

Mill 35-Stevens' Farm Weekly 2 Liters Week ly--I odi ne (lis ) 37-Johnson's Farm

• Monthly--Composite -

Gamma and Sr-89, 90 Oyst.er 44-Lower Cape Fear River Semiannual 500 Grams Gamma (0Y)

Shrimp 46-Ocean Near Discharge Semiannual 500 Grams Gamma and Sr-89, 90 (Sil)

• Control Station.

• • Added as a commitment to the state of North Carolina (started 2nd quarter 1980).

• • • Added as a commitment to the on-site landfill permit (started 1st quarter 1981).

TABLE 1-1 (Continued)

Sample Sanpling Type Sampling Point and Description Frequency Sanple Size Sample Analysis Soil 2-Information Center Every Three Years 500 Grams Gamma and Sr-89, 90 (SS) 10-State Road 1525 at RR Crossing 18-Southport Near CP&L Substation 22-Sutton Plant 23-Projected Maximum Annual Concen-tration Point - NE 24-CP&L Substation on Construction Access Road 27-Ilwy. 211 - West Side of Discharge Canal 35-Stevens' Farm 37-Johnson's Farm

• 41-llwy. 211 - 0.25 Mile East of 7

Ilwy. 133 38-Caswell Beach - 0.5 Mile East of Semiannual 500 Grams Ganina and Sr-89, 90 Discharge Pipe 39-Caswell Beach - at Discharge Pipe 40-Caswell Beach - 0.5 Mile West of Discharge Pipe Surface 29-Ocean - 0.5 Mile East of Monthly 2 Liters Monthly--Gross Beta, tlater Discharge Outfall Tritium and Gamma

( S 11 ) 30-Ocean Near Discharge Outfall Quarterly Composite-31-Ocean - 0.5 Mile West of Sr-89, 90 Discharge Outfall 32-Discharge Canal 48-Intake Canal

• Terrestrial 2-Information Center Quarterly 500 Grams Gamma Vegetation 13-River Road at Intake Canal (TV) 27-Ilwy. 211 - West Side of Dicharge Canal 37-Johnson's Farm *

• Control Station

TABLE 1-1(Continued)

Saaple Sanpling Type Sanpling Pcint and Description Frequency Sample Size Sample Analysis External 1-Junction of Hwys. 87 and 211 Quarterly Not TLD Readout Radiation 2-Information Center Applicable (TL) 3-Junction of Hwys. 211 and 133 4-Standard Products Access Road Off Hwy. 133 Near Intracoastal Waterway 5-Caswell Beach at Pump Station 6-Sunny Point Access Road and RR Crossing 7-Entrance to Old Brunswick Town 8-Hwy. 87 at Boiling Springs Lake 9-Exclusion Boundary, Dirt Road Which Intersects Hwys. 87 and 133 10-SR 155 at RR Crossing 11-Eastern End of SR 1525 12-Exclusion Boundary on Construction Access Road 13-River Road at Intake Canal 7 14-River Road Opposite I. D. Smith Residence 15-River Road and SR 1534 16-River Road and Site of Old Brown

& Root Construction Office 17-Southport - Fort Fisher Ferry Slip 18-Southport Near CP&L Substation 19-Fort Fisher Ferry Slip 20-Kure Beach - Across From AFB Housing 21-Carolina Beach 22-Sutton Plant

• 23-Projected Maximum Annual Concen-tration Point - NE Zooplankton 29-Ocean - 0.5 Mile East of Semiannual 10 cc wet Gagna and Sr-89, 90 (20) Discharge Outfall 30-Ocean Near Discharge Outfall 31-Ocean - 0.5 Mile West of Discharge Outfall 42-Lower Cape Fear River Away From Plant Discharge *

• Control Station

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Following is a tabulation of tne specific methods used in monitoring the various pathways of exposure to man.

Gaseous Effluent Path Submersion Dose and Thermoluminescent Dosimetry Other External Dose Area Monitors Vegetation Path Vegetation Samples Soil Samples Air Samples ,

Milk Path Milk Samples Vegetation and Cattle Feed Samples Air Samples Inhalation Path Air Samples Liquid Effluent Path Fish and Shellfish Path Water Samples Bottom Sediment Samples Aquatic Vegetation Samples Zooplankton Samples Benthic Organisas Fish Samples Oyster Samples Shrimp Samples Water and Shoreline Exposure Thermoluminescent Dosimetry Area Monitors Water Samples Bottom Sediment Samples Soil and Beach Sand Drinking Water Path Groundwater Samples i

l 1-12 l

2.0 PROGRAM

SUMMARY

The purposes of the Environmental Radiological Monitoring Program are:

- To measure any accumulation of radioactivity in ,71e environment and to assess whether this radioactivity is the result of the operation of the Brunswick Plant.

To provide an evaluation of the environmental impact of operating releases of radioactive materials from the Brunswick Plant.

To compare population doses from envi ronmental sample data with corresponding doses predicted in the Final Environmental Statement.

The Brunswick Plant 's preoperational radiological monitoring was conducted from July 24, 1972, until plant start-up in March 1975, and data therefrom were reported to the Nuclear Regulatory Commis-sion in June 1975.

The following locations are designated as the Control Locations for the respective measurements and are intended to indicate conditions away from Brunswick Plant influence:

L. V. SUTTON PLANT - 23 Mi. NNE (Sample Station 22)

Thermoluminescent Dosimetry Area Monitors

! Air Particulate Samples Charcoal Cartridge Samples - Airborne I-131 l

l INTAKE CANAL l (Sample Stations 48 and 13)

Surface Water Samples (48) at Plant Bottom Sediment Samples (13) at River Road 2-1 l

SOUTHPORT WATER SUPPLY (Sample Station 25)

Groundwater Samples JOHNSON'S FARM - 14.5 Mi. NNW (Sample Station 37) l Terrestrial Vegetation Samples Cattle Fodder and Feed Samples Soil Samples Milk Samples VARIABLE LOCATION AWAY FROM PLANT (Sample Station 42)

Plankton Samples Benthos Samples Aquatic Vegetation Samples VARIABLE LOCATION AWAY FROM PLANT (Sample Station 47)

Food Crop Samples l No control locations are designated for shrimp, oysters, or fish. Table 2-1 summarizes the results of the environmental radiological monitoring program for calendar year of 1982.

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4 TQBLE 2-1 i ENUlROPMENTRL RADIOLCSICAL MONITORING PROGRAM SLM4ARY 1

Brunswick Steam Electric Plant Docket Numbers 324 and 325

Drunswick County, North Carolina Calendar Year 1982 i

Modiusa or Pathway Type and Minimum All Indicator Location w/ Highest Annual han Control Locations # of Nonroutine Sampled or Measured Total # of Detectable Locations (2) Name han Mean Reported (Unit of Nasuruaunt) Measurements Activity Moan Distance & Range (2) Range (2) Nasurenents (3) j Porformod (FO A ) (1) Range D1rectIon Air Cartridg> l-131 7.00E-2 All less than PDA All less than E A All less than m A 0 (pCl/m ) 450 I43

)

, Air Porticulate Gross Bata 2.00E-2 2.23E-2 (395/3991 Projected Max. 2.48E-2 151/521 2.21E-2 151/521 0 (pCi/m ) 451 1.88E 7.36E-2 Annual Conc. 1.01E 5.92E-2 9.15E 6.37E-2 Point NE l 0.6 al NE I u 1 1

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Sr-89 2.00E-3 4.31E-3 12/311 Infornetion 6.77E-3 11/41 All less than MDA 0 I

35 1.86E 6.77E-3 Center (single value)

I l.0 ml SW Sr-90 2.00E-3 1.64E-3 12/311 Information 1.64E-3 12/41 All less than MDA 0 35 I 7.27E 2. 55E-3 Center 7.27E 2. 55E-3 1.0 ml SW 1

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! 35 l Cs-137 1. 30E-3 All less than WA All less than E A l.45E-3 (1/41 0

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TABLE 2-1 ENVIR0tNENTAL RADIOLOGICAL MONITORING PRCIRAM SLNMARY i

' Brunswick Steam Electric Plant Docket Numbers 324 and 325

_j Brunswick County, North Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/ Highest Annual Mean Control Locations # of Nonroutine Sampled or Maasured Total i of Detectable Locations (2) Name Mean Mean Reported (Unit of Haasuromant) Measurenunts Activity Mean Distance & Range (2) Range (2) Measurements (3)

Performed DDA) (1) Range Direction Aquat ic Vyptation Sr-89 1.80E-1 No sample available No sample available All less than MA 0 (pci/grau dry) 2(6)

Sr-90 9.00E-2 No sample available No sample available All less than MDA 0 2(6)

] Gamma (16) N/A No sample available No sample available All less than MDA 0 2(6) eg Genthic Organism Sr-89 1.00E-1 3.36E-1 12/61 Ocean - 0.5 mi le 4.76E-1 11/21 1.84-E0 11/21 0

(pCi/gran dry) 8 1.9E 4.7E-1 East of Discharge (single value) (single value)

Outfall

5.7 ml SSW Sr-90 4.30E-2 All less than D0A All less than MDA All less than MDA 0 8

Gamma ' ' Ref. All less than MDA All less than MDA All less than MDA 0 8 Table 5-1

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TABLE 2-1 ENUlR0tNENTAL RADIOLCSICAL MONITORING PROGIAM SLM4ARY Brunswick Steam Electric Plant Docket Numbers 324 and 325 Drunswick County, North Carolina Calendar Year 1982 lb jiu a or Pat hway Type and Minimum All Indicator Location w/ Highest Annual Nan Control Locations # of Nonroutine SampluJ or Nasured Total # of Detectable Locations (2) Name Mean Mean Reported (Uai t of Itaasuremont) lbasurenunts Activity Moan Distance & Range (2) Range (2) Measurements (3)

Performad (H) A ) (1) Range Direction l ibi tc a Sodimunt Sr-89 5.00E-1 All less than MDA All less than M A All less it.an MA 0 (pCl/graia dry) 12 Sr-90 5.00E-1 All less than POA All less than MDA All less than MDA 0 12 Gamnu(16) O t

34(7) u Mn-54 2.3T-2 7.52E-1 111/291 Discharge Canal at 1.49E+014/61 All less than K)A 5.21E 1.76E+0 Stilling Pond 1.20E+0 - 1.76E+0 4.9 ml SSW Co-60 3.00E-2 2.53E+0 183/291 Discharge Canal at 5.20E+0 15/61 9.95E-2 11/51 5 2.2C 7.63E40 Stilling Pond 2.26E 7.63E +0 (single value) f 4.9 ml SSW Cs-137 2.80E-2 2.58E-1 111/29] Discharge Canal at 5.27E-l I4/61 2.68E-1 14/51 0 1.10E 7.17E-1 Stilling Pond 3.14E 7.17E-1 1.02E 3.48E-1 4.9 mi SSW Co-141 4.30E-2 9.11E-2 11/291 Ocean Near Dis- 9.11E-2 11/61 All less than MDA 0 (single value) chargo Outfall (single value) 5.7 ml SSW

TraLE 2-1 ENVIROPNENTAL RADIOLCSICAL MONITORING FROGRAM SlM4ARY Brunswick Steam Electric Plant Docket Numbers 324 and 325 Drunswick County, North Carolina Calendar Year 1982 N dium or Pathway Type and Minimum All Indicator Location w/Hlqhest Annual Nan Control 1.ocations / of Nonroutine Sampled or Measured Total i of Detectable Locations (2) Name Mean Mean Reported (Unit of Nasurorrent) Measuremnts Activity Mean Distance & Range (2) Range (2) Measurements (3)

Performad 00A) (1) Range Direction Bottom Sodimunt Gamm! O 34 II (pCi/gran dry ) Co-144 1.99E-l All less than MDA All less than E A 3.75E-l 11/51 (single value) i 1

Y Fish Gamm 0 os

, (pCl/ gram dry) 8 1

{ Mn-54 6.1 E-3 1. 2 tE-I 12/81 Discharge Canal 1.21E-1 12/41 (wet) 1.40E 2.28E-l 1.5 mi WSW l.40E 2.28E-1 No Control (single value)

Co-60 5.9E-3 1.7E-1 12/81 Discharge Canal 1. 7E-1 12/41 No Control 0 (wot) 8.15E 2.70E-1 1.5 ml WSW 8.15E 2.70E-1 Cs-137 6.30E-3 6.03E-2 13/81 Discharge Canal 7.13E-2 12/41 No Control 0 (wet) 3.83E 9.91E-2 1.5 mi WSW 4.34E 9.91E-2 Fodder and Feed Gamm (pCl/ gram dry) 20 I0I' Cs-137 2.1 E-2 1.83E-1 18/81 Stevens Farm 1. 83E-1 18/81 1. 2E-1 14/121 0 2.38E 4.88E-1 0.9 ml SE 2.38E 4.88E-1 5.32E 2.73E-1

i TABLE 2-1 ENVIR0t#4 ENTAL RADIOLCGICAL MONITORING PROGRAM StM4ARY Brunswick Steam Electric Plant Docket Numbers 324 and 325 Brunswick County, North Carolina Calendar Year 1982 Ndlu.a or Pathway Type and Minimum All Indicator Location w/Hlghest Annual han Control Locations # of Nonroutine Sampled or floasured Total i of Detec. table Locations (2) Name Nan Mean Repor ted (Unit of masurement) Measurenunts Activity Nan Distance & Range (2) Range (2) Measure mnts (3)  !

Performod (M) A ) (1) Range Direction Food Crop Gamne (pCI/ gram dry) 6 Cs137 1. 0E-3 3.61E-1 11/31 Hey 211 - 0.25 Miles 5.8E-2 11/31 0 (wet) (single value) East of May 133 3.61E-1 11/31 (single value) 1.9 al W (single value)

N b

Ground ntater Tritium 1.2E +2 2.76E42 14 /20] Hwy 87-West Side 4.69E+2 11/41 All less than K)A 0 (pCi/L) 24 1.26E+2 - 4.69E+2 of Discharge Canal (single value) 1 mi SW Gamma (16) 108 ' '

t Co60 8.00E0 6.24E+0 11/1041 Hwy 87-West Side 6.24E0 11/41 All less than M A 0 (single value) of Discharge Canal (single value)

I el SW Cst 37 9.00E0 7.25E+0 14/1041 Hey 87-West Side 1.30E+1 11/41 2.88E+0 11/41 0 3.87E+0 - 1.30E+1 of Dicharge Canal (single value) (single value) i l 1 al SW t

?

TABLE 2-1 y ENVIR0tNENTAL RADIOLOGl CAL MONITORING PROGRAM SLNMARY Brunswick Steam Electric Plant Docket Numbers 324 and 325 Brunswick County, North Carolina Calendar Year 1982 Hodium or Pathway Type and Minimum All Indicator Location w/Hlahest Annual Mean Control Locations # of Nonroutine Sampled or Measured Total # of Detectable Locations (2) Name Mean kan Reported (tinit of Haasuromant) Nasurements Activity Nan Distance & Range (2) Range (2) Measurements (3)

Performed (M)A ) (1) Range Direction Milk 1-131 2.00E-1 4. 4 5E-1 11 /11 Stevens Farm 4.45E-1 (1/11 4.05E-1 12/521 0 III3 (pCi/L) 53 (single value) 0.9 mi SE (single value) 2.30E 5.80E-1 Sr-89 3.50E+0 All less than MDA All less than MDA 1.90E+0 11/123 0 l 13(' ' (single value)

Sr-90 2.00E+0 All less than MDA All less than W A 4.41E0 14 /121 0 13 " ' 3.07E+0 - 6.56E+0 i Gamma (l6) 0 13(' '

Cs-137 9.00E + 0 4.85E + 1 11 /11 Stevens Farm 4.85E+1 11/11 3.87EO 11/121 (single value) 0.9 mi SE

• single va lue) (single value) i Oyster Gamma (16) N/A All less than WA All less than MDA No Control 0 (pCi/gran dry) 2

Shrimp Sr-89 2.20E-2 All less than WA All less than MDA No Control 0 (pCl/gran dry ) 2

)' Sr-90 1.15E-2 2.73E-2 11/21 Ocean Near 2.73E-2 11/21 No Control 0 2 (single value) Discharge Canal (single value) 5.7 mi SSW f

TABLE 2-1 ENVIR0fMENTAL RADIOLCSICAL MDNITORING PROGRAM SlHMARY Brunswick Steam Electric Plant Docket Numbers 324 and 325 Brunswick County, North Carolina Calendar Year 1982 i Modluu or Pathway Type and Minimum All Indicator Location w/ Highest Annual man Control Locations # of Nonroutine Sampled or Maasured Total # of Detectable Locations (2) Name Nan Mean Reported (Unit of Maasuronunt) Nasurenunts Activity Nan Distance & Range (2) Range (2) Measurenunts (3)

Performed (K)A ) (1) Range Direction Shrimp Gamnu( 16) N/A All less than MA All less than M A No Control 0 (pCl/ gram dry) 2 Soll Sr-89 5.00E-1 All less than WA All less than MDA All less than MOA 0 (pCl/gran dor) 6

Sr-90 5.00E-1 All less than MA All less than MA All less than MDA 0

, 6 Gamma (16) N/A All less than EA All less than MDA All less than MDA 0 6' '

Surface W ter Gross Beta 1.23E+2 2.70E2 (48/481 Ocean - 0,5 Mlle 3.11E+2 112/121 2.20E+2 (12/121 0 1

(pCl/L) 60 8.95E+1 - 6.44E+2 East of Discharge 1.14E+2 - 6.44E +2 7.33E + 1 - 3. 86E +2 Outfall 5.7 mi SSW Sr-89 5.00Et0 3.95E0 11/16] Ocean - 0.5 Milo 3.95E+0 11/41 2.85E+0 11/41 0

20 (single value) West of Discharge (single value) (single value)

Outfall i

j 5.7 mi SSW

TABLE 2-1 ENVIR0tNENTAL RADIOLCGICAL MONITORING PROGIAM SlNMARY Brunswick Steam Electric Plant Docket Numbers 324 and 325

Drunswick County, North Carolina Calendar Year 1982 l Mudlu.a or Pathway Type and Minimum All Indicator Location w/ Highest Annual W e_g Control Locations # of Nonroutine Sarapled or floasured Total J of Detectable Locations (2) Name Mean Mean

~

Reported (Unit of 11aasuromont) Moasurenunts Activity Mean Distance & Range (2) Range (2) Measurements (3)

Perforned (K)A ) (1) Range Direction Sur f aco Wa ter Sr-90 5.0T +0 4.11EO 11/161 Ocean - 0.5 Mlle 4.11E+0 (1/41 All less than M)A 0 (pCl/L) 20 (single value) East of Discharge (single value)

Outfall 5.7 m SSW Tritium 3.50E+2 4.17E+2 18/481 Ocean - 0.5 Mlle 4.37E+2 13/121 4.43E+2 12/121 0 60 3.73E+2 - 5.24E+2 Wst of Discharge 3.73E +2 - 5.24E +2 3. 4 8 +2 - 5. 38 +2 to 1

O Outfall i

5.7 ml SSW Gamnu M6) 0 60 Cs137 9.00E +0 8.69EO 12/481 Ocean - Near Dis- 1.22E+1 11/41 4.17EO 11/41 5.19EO - 1.22E+1 charge Outfall (single value) (single value) 1 5.7 ml SSW Terrestrial Gamna Vogetation 16

• pCl/gran dry ) Co-60 1. 22E-2 5.30E-2 (1/121 Highway 211-Wst 5.38E-2 (1/41 All less than K)A 0 (wet) (single value) Side of Discharge (single value)

Canal 1

1.5 ml WSW

TABLE 2-1 ENVIR0tNENTAL RADIOLCGICAL MONITORING PROGRAM StM4ARY Brunswick Steam Electric Plant Docket Numbers 324 and 325 Drunswick County, North Carolina Calendar Year 1982 Medium or Pothway Type and Minimum All indicator Location w/ Highest Annual Mean Control Locations # of Nonroutine Sampled or itaasured Total # of Detectable Locations (2) Name Mean Mean Reported (Unit of Maasurenunt) Measurenunts Activity Mean Distance & Range (2) Range (2) Measurements (3)

Performed OOA) (1) Range Direction Torrostrial Gamno(16)

Vugatutloa 16 (gCi/gran dry )

Cs-137 2. 50E-2 1. 26E-1 14/121 River Road at 1.40E-1 12/41 1.4E -1 11/41 (wet) 4.84E 2.11E-1 Intake Canal 6.93E 2.11E-I (single value) 0 1.5 ml ENE ra l

C TLD TLD Readout I mr 1.18E0 187/871 Projected Max. 1.47E +0 14 /41 1.05E +0 14 /41 0 (millirem per week) 91( 7.00E 2.20E0 Annual Conc. 1.00E+0 - 2.20E+0 7.00E 1.4 0E+0 Point NE 0.6 mi NE Zooplankton Sr-89 2.00E-1 2.67E-01 11/61 Ocean - 0.5 Mlle 2.67E-01 (1/21 All less than MDA 0 (pCi/grivn dry ) 6 tsingle value) East of Discharge (single value)

Outfall 5.7 ml SSW Sr-90 1.40E-1 All less than MDA All less than MDA All less than MDA 0 8

Gamna N/A All less then MDA All less than MDA All less than MDA 0 8

FOOTNOTES

1. Minimum detectable concentration is calculated based on three standard deviations above background, using typical sample size in a given count-ing time. Due to counting statistics and varying volumes, occasionally lower minimum detectable activities are achieved.

2. Mean and range are based on detectable measurements only. The fractions of detectable measurements at specific locations are indicated in brackets.

3. Measurements are in excess, at 99.5 percent confidence level, of ten times the control station value or ten times the minimum detectable activity (WA), whichever is larger.

4. Air particulate and charcoal cartridge samples were collected weekly.

There were 52 weeks in 1982 times 8 air monitor stations for a total of 416 analyses. Station 75 (Stevens' Farm vector) was added on April 26, 1982, to the program for an additional 36 analyses. With 2 missed cartridge samples and 1 missed particulate sample, a total of 450 and 451 samples, respectively, were collected.

5. Quarterly composites for gamma and strontium analysis at 8 air monitor stations yielded 32 analyses plus an additional 3 analyses for Location 75 established on April 26, 1982, for a total of 35 analyses.

6. Collection of aquatic vegetation samples at Station 29 (0.5 miles east of discharge outfall), Station 30 (ocean near discharge outfall), and Sta-tion 31 (ocean 0.5 miles west of discherge outfall) was attempted during 1982. These attempts were unsuccessful since there were no permanent beds of vegetation at the required sampling stations. Only the two control locations were analyzed in 1982.

7. Bottom sediment samples are required semiannually at six locations for a total of 12 samples. However, due to increased concentrations of radio-nuclides, additional sampling was performed for a total of 34 sampl es .

Strontium and gamma analyses were performed on 12 routine samples. Gamma analyses were performed on the additional samples. For the months of October, November, and December 1982, 30-day nonroutine reports were submitted to the NRC.

8. Fodder samples were not available at Station 35 (Stevens' Fara) during January, February, March, and December 1982. Therefore, 3 sanplu were i

obtained from Station 35 and 12 samples were obtained fron Statica 37 for a total c" 20 fodder and feed samples for 1982.

9. The TLD from Station 11 was missing in the first quarter of 1992.

Twenty-three stations are sampled quarterly. 'li th this one miss..

sample, 91 observations were reported for 1982.

2-12

10. Six groundwater sample stations require tritium and gamma analysis once per quarter as per technical specifications. Seventeen additional groundwater stations at the Brunswick County landfill .' quire only quar-terly gamma analysis. Four samples monitor Brunswick Steam Electric Plant's landfill . These samples are also sampled quarterly and analyzed for gamma emitters.

11. Milk samples were collected weekly. There were 52 weeks in 1982, there-fore, having a possibility of 104 samples. No milk samples were avail-able at Station 35 (Stevens' Cow) after January 4,1982, because the cow was dry.

12. The January composite for Station 35 (Stevens' Farm) consisted of one sample because additional samples were not available for the remainder of January and for 1982.

13. Ten soil samples are collected once every three years. This was peforued in 1981. Collection from three sample stations are required semi-annually.

14. Dependent on ambient background conditions.

15. Minimum sensitivity is ~ 1 mr. Refer to Section 5.6 for additional information .

16. Summary of gamma analysis results in this report does not include the following naturally occurring isotopes since most environmental samples contained some or all of these: Be-7, K-40, T1-208, Pb-212,84-212, Bi-214, Pb-214, Ra-226, Ac-228, and Th-234.

l l

l 2-13

3.0 INTERPRETATIONS AND CONCLUSIONS 3.1 Air Sanples

\

The\ gross beta results for air particulate samples collected during the year of 1982 are below the preoperational levels. All indicator station activities averaged 2.23E-2 pC1/m 3 compared to 9.83E-2 pCi/m3 over the entire preoperational monitoring period. The 1982 average activity of control station samples was 2.21E-2 pCi/m3 which is a more meaningful comparison to the indicator stations due to yearly weather conditions (amount of rainfall) and other sources of activity (fallout from nuclear testing). The gross bata plots in

~

Figures 3-1 through 3-8 show each indicator station in comparison to

'the control station. They verify no significant increase in the indicator location activities in comparison to the control station with the exceptions of St tions 2 (Visitors Center), 23 (PMAC), and 45 (on-site). The activities for these locations for the first four months revealed gross beta acti vities of less than 2 1/2 times higher than the control station. The gamma isotopic and strontium analyses for all locations during this time period revealed Sr-89 and Sr-90 activities with average concentrations of 4.31E-3 pCi/m 3 and 1.64E-3 pC1/m 3 , respectively.

The following are doses and assumptions from Reg. Guide 1.109 for inhalation of Sr-89 and Sr-90 in air by the maximum exposed individ-ual.

10CFR50 Infant Child Teen Adult App I inhalation m3/yr 140v 3700 8000 8000 --

Dose factors Sr-89 mrem /pCi 1.45E-3 5.83E-4 3.02E-4 1.75E-4 --

1 Dose factors Sr-9.0 mrem /pCi 8.03E-3 3.99E-3 2.06E-3 1.20E-3 --

Dooe to lungs mrem /qtr 6.80E-3 8.38E-3 1.11E-2 5.45E-3 --

Dose to lungs mrem /yr 2.72E-2 3.35E-2 3.74E-2 2.18E-2 15.0 Determination of iodine-131 in air via charcoal was made using gamma spectromet ry. No iodine-131 was detected for the entire year.

3-1

TABLE 3-1 GROSS BETA AIR PARTICULATE SIX-MONTH AVERAGES FOR COMPARISON OF PREOPERATIONAL DATA TO 1982 DATA 1st Halg '82 2nd Half '82 1st Half '73 2nd Half '73 1st Half '74 2nd Half '74 Stations pC1/m I

AP-2 2.9 E-2 1.8 E-2 1.5 E-2 2.9 E-2 1.7 E-1 1.1 E-1 Infarmation Center AP-5 1.9 E-2 1.6 E-2 1.5 E-2 2.8 E-2 1.6 E-1 1.1 E-1 Caswell Beach 9 Pune Station AP-13 2.6 E-2 1.9 E-2 1.6 E-2 3.2 E-2 1.5 E-1 1.1 E-1 l w Southport near s's CPal Substation AP-22 1.2 E-2 2.0 E-2 1.7 E-2 3.2 E-2 1.6 E-1 1.0 E-1 Sutton Plant

'(Control Station)

AP 3.1 E-2 1.9 E-2 Hot in use 3.1 E-2 1.6 E-1 1.2 E-1 PMAC AP-24 2.7 E-2 2.0 E-2 Not in use 3.4 E-2 1.7 E-1 1.1 E-1 CPAL Substation on Construction Access Road AP-4S 2.9 E-2 2.1 E-2 1.6 E-2 3.1 E-2 1.8 E-1 1.1 E-1 I On Site ( 2 Samples I Only)

CP&L ENVIRONMENTAL MON!TORING SYSTEM GROSS BETA AIR PARTICULATE (PIC0 CURIES PER CUBIC METER)

STAR IS SAMPLE STATION ACTMTY DIAMOND IS CONTROL STATION ACTMTY PLANT =BSEP POINT =02 ACTIVITY 0.0750 -

0.0500

[ 0.0250 - t ,

[ -

pp . 4 g

r \

0.0000 ~

,,,,,,,,,,,,,,,, , m m p m m ,,,,,,,,,,,,,,,,,,,,, m ,,,,,,,,,, m ,q m ,,,, ,,,,,,,,,,,,,,,,,,,,,,,,_

0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S O N D D A A E A P A U U U E C D E E N .Ti B R R Y N L G P T V C C 8 A 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE i

Figure 3-1

CP&L ENVIRONMENTAL MONITORING SYSTEM GROSS BETA A!R PARTICULATE (PIC0 CURIES PER CUBIC METER)

STAR IS SAMPLE STATION ACTTVITY DIAMOND IS CONTROL STATION ACTMTY PLANT =BSEP POINT =05 ACTIVITY 0.0750 --

~

f 0.0500f t

^

w i 1 .9 L 0.0250 - -

\ '

(I

~

U s  :

+

0.0000 i....... ............... ..n ... .......i....... ....... ....n .i.......i1...... .......,...............,-

0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S O N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE Figure 3-2

CP&L EBMRONMENTAL MONITORING SYSTEM GROSS BETA A!R PARTICULATE (PICOCURIES PER CUBIC METER)

STAR IS SAMPLE STATION ACTMTY

D!AMOND IS CONTROL STATION ACTMTY PLANT =BSEP POINT =18 ACTIVITY 0.0750 --

AL 0.0500 9

~

' > . 4 4

6, 0.0250f '

" ^ 7 6 '/ 4 .

< :44 y ,

l 0.0000 ,,,,,,,,,,,,,,,rrrrrr *>i trir i i i i 0 2 2 2 2 2 1 1 1 1 0 0 'O 3 '

1 9 6 6 3 1 8 6 3 0 8 5 3 1

J J F M A M J J A S O N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8

2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE Figure 3-3

CP&L ENVIRONMENTAL MONITORING SYSTEM GROSS BETA A!R PARTICULATE (PICOCURIES PER CUB!C METER)

STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTMTY PLANT =BSEP POINT =23 ACTIVITY 0.0750 --

O O.0500 - _

_ s .-

a. d. -

^

l a 0.0250 - i s 'g a  ;. ,

3 3 i .

v .l, . v

^ -

+-

^

- \

. . s p

0.0000 TT'TT'7712'rtrIt"TTT' rrrrrrrrrrrtT2TTrrrrrrrrri r'"TrrrrrrtTr'itT'rTrrrrr rrT2 ' i i ' ' ' I ' i ' ' ' ' i i el ' ' ' ' ' 1 0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S O N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 i

DATE Figure 3-4

CP&L EtMRONMENTAL MONITORING SYSTEM GROSS BETA l

A!R PARTICULATE

! (P!C0 CURIES PER CUBIC METER) i STAR IS SAMPLE STATION ACTMTY DIAMOND IS CONTROL STATION ACTIVfiY PLANT =BSEP POINT =24 ACTIVITY '

0.0750 -

i 1

2.0500 _

L 0.0250 -

3 v

/.i

-

y^.

g, o v 4 '

r '

g 3-

,, v -

0.0000 -

TT'itTTritT TTittitit"T'"itT'rt r yrrrrrtritti rrrrrrrrrtityrrrrrittrrrrr rrTT"Trrrrrrty. . . i . . . ;

O 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S 0 N D D '

A A E A P A U U U E C D E E i N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE Figure 3-5

CP&L ENV!RONMENTAL MONITORING F.' STEM GROSS BETA A!R PARTICULATE (PIC0 CURIES PER CUBIC METER)

STAR IS SAMPLE STATION ACTMTY DIAMOND IS CONTROL STATION ACTIV!TY PLANT =BSEP POINT =45 ACTIVITY 0.0750 -

T

~

0.0500

- . .~.

^

+  ; -

.t.

\

7 ^-

5 0.0250 - l ,

. h.. k

\ .,; .;f

.  : .,i .,

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. . s 1 .. ..

e . ,, .

+8 .j.

0.0000 "JT T T TT t T T""'T""T ""'t' T"Ivi t trT "T"t'T '"rr"T 'TTit rtitritrTTT"itTT i ' ' ' ' ' i O 2 2 2 2 2 1 1 1 1 0 0 0 3 j 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S O N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 I

DATE I Figure 3-6 ,

l

CP&L ENVIRONMENTAL MONITORING SYSTEM GROSS BETA AIR PARTICULATE (PIC0 CURIES PER CUBIC METER)

STAR IS SAMPLE STATION ACTMTf DIAMOND IS CONTROL STATION ACTIVHY PLANT =BSEP POINT =74 ACTIVITY 0.0750 -

t 0.0500 - ~

.o

\ ..

I *.. *

• 0.0000 -

JrrritTT[TrrrirTJfrirritTrrrrrrrrrrrrrritrrrr "Tir1rtrrrrrrritTTrtir...i i .....;i.iii..gi..iiiiji......,

0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S O N D D A A E A P A U U U E C 0 E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE Figure 3-7

i CP&L ENVIRONMENTAL MON!TORING SYSTEM GROSS BETA A!R PARBCULATE

(PICOCURIES PER CUBIC METER)  ;

STAR IS SAMPLE STATION ACTMTY D!AMOND IS CONTROL STATION ACTMTY PLANT =BSEP POINT =75 ACTIVITY 4

0.0750 - _

b -

! 0.0500 -

J .

.. 3 >

,i 0.0250 -- ' .g a l'

• ~

_ ;f.f.',.r. ,f d ,,

0 . 0000 ['It'rvirirrrrrrrrrrrrr rrrrr r rrr rr rrrrrrititt rrrrrrrri rrrrrrrtitrtittitrrrT'TitTrrrrr 0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 i

J J F M A M J J A S O N D D A A E A P A U U U E C D E E N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 l 2 2 2 2 2 2 2 2 2 2 2 2 2 2 l

l DATE Figure 3-8

3.2 Milk Sanples Analysis of weekly milk samples showed measurable concentrations of iodine-131 in 2 of 52 control station samples. For the collection

~

periods of 4-5-82 and 5-10-82, activity at concentrations of 0.23 pCi/ liter and 0.58 pCi/ liter, respectively, was revealed. The sample collected 4-5-82 was counted by a low-beta counter. This acti vity was approximately 50 percent below the technical specification required MDA (0.5 pCi / liter) and appears to be a statistical artifact. The sample collected on 5-10-82 was counted by a beta-gamma coincidence system. This system was recalibrated using a new detector and standard on 5-3-82. It appears in retrospect that this sample was analyzed immediately following a QC check and may be attributed to contamination of the detector.

Station 35 (Stevens ' Farm) revealed iodine-131 activity at the concentration of 0.44 pCi/ liter. The absence of iodine-131 at the milk control station (Johnson's Farm) during this time period, plus the close proximity of the Stevens' Farm to the Brunswick Site (0.9

- miles S.E.) and with the absence of another apparent source of activity, this contribution may be attributed to the Brunswick Plant. The dose to an infant's thyroid for an entire year's consumption of milk can be calculated using assumptions contained in Regulatory Guide 1.109. The annual dose to an inf ant 's thyroid would be 0.039 millirem per year from a single exposure to milk with an iodine-131 concentration of 0.44 pCi/ liter. This thyroid dose is significantly lower than the corresponding dose estimate cf 28 milli rem per year gi ven in the Brunswick Final Environmental Statt. ment for this location.

t 1

j 3-11

The only indicator station milk sample was collected in January 1982 from Milk Station 35 (Stevens' Farm). The gamma isotopic analysis revealed cesium-137 activity with a concentration of 48.5 pCi/ liter. A detailed investigation of the elevated cesium-137 concentrations in this area was performed and reported to the NRC in 1981. This concentration is elevated in comparison to commercial dai ry herds. However, this concentration is normal for this partic-ular location based upon data compiled since 1972. Figure 3-9 details the history of this sampling location. This activity is not attributed to Brunswick Plant effluents.

Radiostrontium analyses revealed essentially no changes in the strontium-89 and strontium-90 levels in milk compared to correspond-irg preoperational levels. The 1982 average strontium-90 concentra-tion in milk was 4.41 pCi/ liter at the control station (Johnson 's -

Farm) compared to 9.0 pCi/ liter during the preoperational period.

3.3 Vegetation (Terrestrial Vegetation, Fodder and Feed, Food Crop)

Terrestrial vegetation is sampled quarterly at four locations. Pine needlet are used as the sample media because of its availability at any location du ring any season. The high surface area on pine needles enables this particular sample type to collect air particulates rather efficiently and makes it one of the most sensitive indicators for detecting fallout.

Gamma isotopic analyses revealed the presence of cesium-137 with an average concentration of 1.40E-1 pCi/g, dry. The cesium-137 concentration was very similar to the control station cesium-137 concentration of 1.46E-1 pCi /g, dry. Therefore, this activity was not attributed solely to 3SEP plant operations.

3-12

CS-137 ACTMTY IN MILK SAMPLES FROM STATION 35 (PCI PER LITER)

CS-137 ACTIVmES LESS THAN MDA WERE OMITTED AVERAGE MDA=9.0 PCI PER LITER ACTIVITY 3 . 00E+02--

1 A  :

2.00E+02- -

a ;T Gb .

1 _

U -

t t .

? T' LL L j \ .8 i.00E+02- 6 .h t

- 1

, A. 'T

~

t- i . d.

' ../\. 1 +

I? 'I o /  :-  :: ,AE \.

V -

. :- \.? =

w: \f=Ni

- sj\. se.m.. .;:t-E.8. ,8 =. =

_ .. . e

~

0.00E+PO- i l 1 I I i 1 1 I I I I 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 J J J J J J J J J J J J A A A A A A A A A A A A N N N N N N N N N N N N 7 7 7 7 7 7 7 7 8 8 8 8 2 3 4 5 6 7 8 9 0 1 2 3 DATE

-- _ . . _ - . . = _ _

I i

Cattle fodder and feed (pasture grass) sampled monthly revealed

! cesium-137 activity with an average concentration of 1.83E-1 pCi/g, 4

dry (8 out of 8 samples) at Stevens' Farm. This activity is compar-able to the control station (Johnson's Farm) which had a concentra-tion of 1.26E-1 pCi/g, dry (4 out of 12 samples).

The high frequency of detection of cesium-137 at Stevens' Farm is attributable to farming practices as related to pasture fertiliza-tion. For example, the owner has not enhanced pasture growth. The last known major fertilization was performed in 1977. Thus, recycling of cesium in the pasture is occurring.

Food crops sampled during the growing season revealed cesium-137 activity with a concentration of 5.85E-2 pCi/g, wet (squash), which had a high associated relative counting error (~59 percent).

Ingestion by the maximum individual (teenager) for the most critical organ (liver) would yield a dose of 5.67 millirem per year. This assumes consumption of 630 Kg (1389 pounds) of squash. This dose is well below 10CFR50, Appendix I, design objectives of 15 millirem per year for the most critical organ.

3.4 Soil f Soil (beach sand) samples collected semiannually and analyzed for radiostrontium and gamma emitters revealed no measurable radioactiv-ity.

3.5 Surface Water Surface water is sampled rmnthly at five locations and analyzed for

! gross beta, radiostrontium, tritium, aad gamma emitting radio-nuclides. Gross beta activity was measurable in 48 of 48 samples analyzed averaging 270 pCi/ liter. This average is comparable to the control station average of 220 pCi/ liter which was measurable in 12 of 12 samples. Refer to Figure 3-10 for a comparison of intake canal (control station) ve. sus discharge canal .

I 3-14 l

CP&L ENVIRONMENTAL MONITORING SYSTEM GROSS BETA SURFACE WATER (PICOCUR!ES FER LffER)

STAR IS SAhiPLE STATION ACTMTY D!Aht0ND IS CONTROL STATION ACTMTY l POINT =32 l PLANT =BSEP ACTIVITY -

600 -_

Y 400 - . 3 l

'_ ./ \:

[/~

l 3 N*

l 200 - N ~

• l i _

c .f -

l 0.0000 -

"J f f TT T f 7 JTT T T T T T J f f T TT 7 t J1 T TTTT TJ ffTT T T ' "''T T """T"I"'"T'"" T ''T""'TTM 0 2 2 2 2 2 1 1 1 1 0 0 0 3 1 9 6 6 3 1 8 6 3 0 8 5 3 1 J J F M A M J J A S O N D D A E A P A U U U E C O E E A

N N B R R Y N L G P T V C C 8 8 8 8 8 8 8 8 8 8 8 8 8 8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 DATE Figure 3-10

. _ . __ _ = _ -__ _ -__ - _ - --

l Radiostrontium and tritium analyses revealed measurable activity of concentrations at the typical minimum detectable activities.

Gamma isotopic analyses revealed cesium-137 activity with an average concentration of 8.69 pCi/ liter in 2 of 48 samples. The control station revealed cesium-137 activity with a concentration of 12.2 pCi/ liter in 1 of 4 samples. In view of the amount of rainfall which influenced the Cape Fear River, the sampling techniques for I these locations, the sporadic appearances of activity, and the low concentrations (near MDA), the cesium-137 activities are not attri-butable to Brunswick Plant operations.

3.6 Fish Fish samples collected quarterly and analyzed for gamma emitters at Station 30 (ocean near discharge outfall) are comparable to preoper-ational results. Only 1 of 4 samples collected at Station 30 revealed Cs-137 activity with a concentration of 0.038 pCi/g, dry.

l During preoperational testing cesium-137 was detected in 5 of 23 samples with an average concentration of 0.17 pCi/g which ranged from 0.035 pCi/g to 0.42 pCi/g.

The gamma analyses for fish samples collected at Station 43 (dis-charge canal) revealed manganese-54 (2 of 4), cobalt-60 (2 of 4),

and cesium-137 (2 of 4) with average concentrations of 26.5 pCi/Kg, wet; 40.1 pCi/Kg, wet; and 16.3 pCi/Kg, wet, respectively. The maximum potential dose available to man via the fish-man pathway is summarized in Table 3-2.

l Table 3-2 Organ Dose (mrem /yr) 10CFR50 APP I (mrem /yr)

Liver 0.0409 20 Kidney 0.0132 20 GI-LLI 0.0424 20 Total Body 0.0235 6 These doses are based on an individual eating 46.3 pounds of minnow-sized fish in one year, harvested from the discharge canal. These doses are well within plant design objectives.

3-15

3.7 Shring, Benthic Organisms, and Oysters Shrimp samples collected semiannually and analyzed for radio-strontium and gamma emitters revealed only strontium-90 in a single incident with a concentration of 2.73E-2 pCi /g, dry, which has a less significant dose than fish as indicated in Table 3-2.

Oyster samples collected semiannually and analyzed for gamma emit-ters revealed no measurable radioactivity.

Benthic samples (crabs) collected semiannually and analyzed for radiostrontium and gamma emitters revealed strontium-89 at Stations 29 (ocean-0.5 miles east of discharge outfall) and 30 (ocean near the discharge outfall) with an average concentration of 3.36E-1 pCi /g, dry. The control station revealed 1.84E+0 pCi/g, dry or 0.33 pCi/g, wet. Assuming the maximum adult consumes 5 Kg of crabs collected from the control station (since benthos are migratory and this concentration appears elevated) the dose would be 0.5 millirem per year. It should be noted that the radiochemical analysis was performed on the entire crab, including the shell, which presented some technical difficulties. This technique has been further refined to improve analytical results.

3.8 Bottom Sediment, Aquatic Vegetation Bottom sediment samples coilected semiannually and analyzed for radiostrontium and gamma emitters revealed manganese-54, cobalt-60, cerium-141, cerium-144, and cesium-137 as shown in Table 2-1. These radionuclides are attributed to Brunswick effluents. Bottom sedi -

ments are not consumed by man; therefore, no dose commitment esti-mates are given.

3-17 1 - - - - . -

l Aquatic vegetation samples are attempted to be collected semiannual-ly and analyzed for radiostror; tium and gamma emitters. Three loca-tions in the vicinity of the discharge outfall have no active beds of vegetation, therefore, providing no sample. The aquatic vegeta-tion collected from the control station indicated all concentrations of radionuclides were less than mirimum detectable activity.

3.9 Groundwater i

Groundwater samples are collected and analyzed quarterly for tritium and gamma emitters. Trace amounts of tritium were detected in 4 of 20 analyses with high associated relative counting errors. With these errors, it is probable that the tritium does not actually exist in the quantities reported.

Gamma analyses revealed cobalt-60 in 1 of 108 analyses and cesium-137 in 4 of 108 analyses with average concentrations of 6.24 pCi/

i liter and 7.25 pCi/ liter, respectively. These results are slightly below MDA values for typical routine analyses. The typical MDA for cobalt-60 is 8.0 pCi/ liter. The typical MDA for cesium-137 is 9.0 pCi/ liter. In addition, hi gh associated relative counting errors existed. These stations were resampled and revealed results of less than minimum detectable activities. Further investigation revealed possible contamination of detectors at the time of analysis.

3.10 Zooplankton Zooplankton collected semiannually and analyzed for strontium-90 and gamma emitters revealed no detectable activity in 1982. Strontium-l 89 was seen in a single sample which revealed 0.27 pCi/g, dry. All samples consisted of a large water fraction. Attempts were made to separate water from the residue by filtration. It was apparent that the significant water fraction and relative amount of plankton oer sample was highly va ri able. Consultation with aquatic ecologists who perform plankton inventories showed that the measures represent the state of the art. Classification was performed by microscopic

, 3-18 l

exc?ination of slides; the " biomass" inventories of plankton rely upon simple mechanical separation. These inventories represent plankton plus other organisms such as algae and other dissolved and suspended materials. However, the strontium-89 result may be an artifact since the plant liquid releases revealed strontium-89 activities were two to three orders of magnitude lower than other fission and activation products released during and prior to this time. In addition, there was an absence of gamma-emitting fission ai.d activation products for these samples.

3.11 External Radiation Dose Environmental dosimetry data did not show any significant changes from the corresponding data of previous years. Station 23 (PMAC) continued to show the highest average dose as indicated in Table 2-1.

3.12 Sunnary In summary, the following statements can be made in regard to all radioactive effluents (air particulate, gaseous, and liquid) by the Brunswick Steam Electric Plant:

1. All detectable radioactivities have been below the levels set forth in the Code of Federal Regulations, Title 10, Part 20.

2. The radioactivity released from the Brunswick Steam Electric l Plant has not significantly increased the amount of radioactiv-ity detected in the environs surrounding the plant.

l

3. A total of 1,732 environmental analyses were performed during 1982 to ensure compliance with -il rules and regulations.

3-19 7,, , , . .-..-. .-y _.

3w., ,m9 ,,.,v.,y- , , ,__,g.___

...,,,,__-y_7_ _ ,,,,,,y-_,-,%-,.__,,y _ _y ,,, - -

4.0 MISSED SAMPLES AND ANALYSES 4.1 Air Cartridge The sample from Station 23 for January 25, 1982, was not collected due to a blown fuse in the sampling system. The sample from Station 2 for February 1,1982, was not collected due to missing cartridge.

4.2 Air Particulate The sample from Station 23 for January 25, 1982, was not collected due to a blown fuse in the sampling system.

4.3 Aquatic Vegetation Collection of aquatic vegetation samples from Station 29 (0.5 miles east of discharge outfall), Station 30 (ocean at discharge out-fall), and Station 31 (0.5 miles west of discharge outfall) was not successful during 1982 since no beds of vegetation were available.

4.4 Fodder and Feed Fodder samples were not available during January, February, March, and December 1982 from Station 35 (Stevens' Farm).

4.5 Milk Milk samples from Station 35 (Stevens ' Farm) were not available after January 4, 1982. Only 1 of 52 samples were collected for 1982. The single cow at this location was dry during this period.

, 4.6 External Radiation (TLD) l The TLD from Station 11 was declared missing from the first quarter of 1982. For 19C, 91 of 92 samples were collected.

4-1

i 5.0 ANALYTICAL PROCEDURES 5.1 Gross Beta Gross beta radioactivity measurements are made utilizing a Tennelec Low-Background Alpha / Beta Counting System. The minimum detectable levels (99 percent confidence level) are approximately 0.82 pCi per sample.

Air particulate samples are mounted in 2-inch stainless steel plan-chets and counted directly.

Acidified water samples are evaporated to a low volume, transferred onto a 2-inch tared stainless steel planchet, evaporated to total dryness, then counted on the Tennelec with appropriate self-absorption correction, based upon sample weight.

5.2 Tritium Liquid samples requiring tritium analysis are first distilled. Five milliliters of the distillate are mi xed with 10 milliliters of liquid scintillation cocktail and counted on a liquid scintillation counter for up to 300 minutes. The sensitivity is approximately 350 pCi/ liter at a 99 percent confidence level.

5.3 Iodine-131 Iodine-131 airborne concentrations are quantified by the Ge(Li)-

N04420 gamma spectrometry system. The cartridges are placed on the detector and each charcoal cartridge is counted individually.

Iodine-131 in milk is analyzed by use of anion exchange resin, sodium hypochlorite leach, and orgnic extraction. Iodine is pre-cipitated as silver iodida, collected on a tared filter, dried, and counted on a beta-gamma coincidence systen. The minimum detectable concentration at time ::f count is less than 0.5 pCi/ sample at a 99 pce;ent confidence leval .

5-1

l 5.4 Strontium-89, 90 Strontium is removed from environmental samples by the following methods: (1) leached with dilute acid from air filters, sediment, and soil; (2) direct precipitation from both fresh and saline water; and (3) adsorption as Sr+2 from milk, aquatic organisms, and vegeta-tion onto a cation exchange resin column.

In all cases strontium is p mcipitated as strontium carbonate, collected on a tared filter, dried, and counted on the Tennelec system. After an ingrowth period of 10-14 days to establish secular equilibrium between strontium-90 and yttrium-90, the yttrium is isolated as the oxalate and counted.

5.5 Gamma Spectrometry Ge(Li) 1 Gamma spectrum analysis utilizes a lithium-drifted germanium detec-tor with a thin alumir.um window housed in a steel and lead shield.

The analyzer system is a Nuclear Data 4420 with ND812 computer.

Table 5-1 summarizes minimum detectable concentrations derived from instrument sensiti vity, based upon a blank sample background at 99 percent confidence level.

Air particulate composites are fitted into a petri dish and analyzed di rectly.

Liquid samples are boiled down to a small volume, transferred to a polyethylene beaker, and analyzed directly.

Bottom sediment and soil are dried, weighed, and then analyzed in a marinelli beaker.

Fish samples are cleaned and dressed similar to meal preparation.

Oysters and shrirp are separated from any shell. These samples are then dried at 100 C and ground to produce a homogeneou" mi xtu re.

These are placed in a polyethylene beaker and analyzed.

5-2 i

l Zooplankton, benthic organisms, and terrestrial and aquatic vegeta-tion are dried at 100 C, ground, and placed in containers to be analyzed.

5.6 Thermcluminescent Dosimetry Each area monitoring station includes a polyethylene packet, which is an opaque polyethylene bag containing three each calcium sulfate phosphors contained in a Panasonic UD-814 badge. The packet is light-tight and weatherproof.

Dosimeters are machine annealed before field placement. Following receipt from the field, each dosimeter is read, utilizing Panasonic TLD readers. This instrument integrates the light photons emitted from traps deexcited above 150 C. The lower energy traps are auS-matically eliminated through a preheat cycl e. Calibration is checked regularly using dosmieters irradiated to known doses. Prior to the measurement of each dosimeter, the instrument is checked through use of an internal constant light source as a secondary standard. The mi nimum sensiti vity of the dosimeters used is approximately 1 nR.

The exposure reported is corrected for exposure received in transit and storage through the use of control dosimeters.

l i

5-3 i

Table 5-1 Typical Minimum Detectable Concentrations Ge(L1) Gama Spectrometry Air Samples Cs-134 1.6 x 10-2 pCi/M 3 Cs-137 Ba-140 1.6 x 10 2 La-140 5.2 1.2 xx 10 10-2 Other Expected 1.2 x 10-2 to Gamma Emitters 1.2 x 10-Water Samples Cr-51 80 pCi/ liter Co-58 8 Co-60 8 Mn-54 8 Cs-134 9 Cs-137 9 Ba-140 30 La-140 20 Other Expected 8 to Gamma Emitters 80 Soil and Bottom Sediments Cs-134 35 pCi/Kg (dry)

Cs-137 35 Cr-51 280 Co-58 30 Co-60 30 Mn-54 30 Other Expected 30 to Gamma Emitters 300 Fish, Shrimp, Oysters, Benthos, and Vegetation I-131 13 pCi/Kg (wet)

Cs-134 14 Cs-137 13 Cr-51 110 Co-58 12 Co-60 13 Mn-54 12 Other Expected 11 to Gamma Emitters 120 54

-- . _. .. .--- _ _ . . ___= .

Mdendum To The Environmental Radiological Monitoring Report January 1, 1982, Through December 31, 1982 Minimum Detectable Activities In review of the environmental data summarized in the principle report, it is noted that a small fraction of the analyses did not meet the minimum detectable activities specified in Table 4.2-4b of Appendix B, Environmental Technical Specifications, pp. 4-24. These particular results are not viola-tions of the technical specifications but rather the results of interfering factors as recognized in Specification 4.2, Radiolooical Environmental Moni-toring Program, pp. 4-6. "The minimum detectable activi ti es . . .will be routinely acnieved. However, the minimum detectable activity will vary de-i per. ding on sample si ze , . . .and other factors. Therefore, on occasion the minimum detectable activities. . .may not be achieved ."

The following table summarizes the 1982 data that did not meet or appear to meet the minimal detectable activities and the primary factors effecting the reduced sensitivity. These 32 analyses represent less than 2 percent of more than 1700 analyses performed in the 1982 program for the Brunswick Plant.

1

- - - _ _ _ . ._ . _ _ - - - . ._. - . - - _= .

l

. o Table A-1 Missed Minimum Detectable Activities Date Observed Tecnnical Sample Collected Analysis MDA Specification Comments Air Charcoal I-131 pCi/m 3 pCi/m 3 4

, AC-22 6-7-82 I-131 <7.38E-2 <7.00E-2 (1)

! AC-74 9-27-82 I-131 <1.33E-1 <7.00E-2 (1)

Aquatic Vegetation pCl/Kg(dry) pCi/Kg(wet) i AV-42 1-26-82 S r-89 <422 <50 (2)

AV-42 1-26-82 Sr-90 <152 <50 (2)

AV-42 7-15-82 Sr-89 <737 <50 (2)

AV-42 7-15-82 Sr-90 <443 <50 (2)

Benthic Organisms pCi/Kg(wet) pCi/Kg(wet) '

30-42 1-29-82 Sr-90 <119 <50 (3)

Milk pCi/1 pCi/1 MK-35 Jun. Comp. Sr-89 <32.7 < 5 .0 (4)

Sr-90 <22.5 <5 .0 (4)

MK-36 Jun. Comp. Sr-89 <5.97 <5.0 (4)

MK-37 Mar. Comp. Sr-89 <8.69 <5.0 (4)

Cr-90 <6.71 <5.0 (4)

W:-37 7/27/82 I-131 <0.82 <0.50 (5)

Bottom Sediment pCi/g(dry) pCi/g(dry)

SD-13 1-6-82 S r-89 0.692 0.500 (4)

Sr-90 0.558 0.500 (4)

SD-29 1-29-82 Sr-89 0.903 0.500 (4)

SD-30 1-29-82 Sr-89 0.890 0.500 (4)

I 1

2

O Table A-1 (Cont'd.)

Date Observed Technical Sample Collected Analysis MDA Specification Comments SD-33 1-5-82 Sr-89 0.738 0.500 (4)

Sr-90 0.589 0.500 (4) 5D-34 1-28-82 Sr-89 <0.749 <0.500 (4)

Sr-90 <0.628 <0.500 (4)

Soil pCi/g(dry) pCi/g(d ry)

SS-38 1-5-82 Sr-89 <0.809 <0.500 (4) 1-5-82 Sr-90 <0.655 <0.500 (4)

SS-39 1-5-82 Sr-89 <0.716 <0.500 (4) 1-5-82 Sr-90 <0.559 <0.500 (4)

SS--40 1-5-82 Sr-89 <0.659 <0.500 (4)

Sr-90 <0.523 <0.500 (4)

Surface Water pCi/1 pCi/l SW-29 4-20-82 H3 <355 <350 (6)

SW-30 4-20-82 H3 <355 <350 (6)

SW-31 4-20-82 H3 <355 <350 (6)

SW-32 4-15-82 H3 <365 <350 (6)

, SW-48 4-15-82 H 3 <365 <350 (6) l SW-32 7-15-82 H3 <381 <350 (6)

SW-48 7-15-82 H3 <381 <350 (6)

SW-32 2nd quarter Sr-89 -

<5.68 -

<5.0 (3) composi te SW-48 2nd quarter Sr-89 -

<9.47 -

<5.0 (3) composite Zooplankton pCi/g(dry) pCi/g(dry)

Z0-31 1-29-82 Sr-89 <0.500 <0.300 (7)

Z0-30 7-15-82 Sr-89 <0.319 <0.300 (7)

Z0-31 7-15-82 S r-89 <0.380 <J.300 (7)

ZO-42 7-15-82 Sr-89 <0.304 < .300 (7) 3

1 O

Comments

1. Air sagples collegted at Station 22 and Station 74 had low sample volumes, 48.5 m and 84.8m , respectively.

2. The only available aquatic vegett .f on samples collected during 1982 were at Station 42 (Control Station). The wet weights were not recorded on these samples; however, based on past experience, there is a Factor 10 between wet weights and dry weights for aquatic vegetation. Therefore, these ICAs are approximately an order of magnitude lower when converted to concentrations of pCi/Kg wet, which is in compliance of technical speciff-cations.

3. Strontium analysis of benthic organisms (crabs) and seawater are very difficult to analyze at best. These samples were chemically prepared and low chemical yields were experienced.

4. Mid-November 1981 the low beta counter was tukea out of service and was determined to be beyond repair. The new low beckground beta counter was received and placed in service mid-February 1%2. During the intervening time a gas proportional counter was used. This counter had a typical background of 25 counts per minute as opposed to 1.5 counts per minute for low background instrumentation. The higher background prevented the analysis from meeting the prescribed MDA.

5. This sample was inadvertently counted for 100 minutes rather than the 700-1000 minutes routinely used. By the time the discrepancy was detected, a recount could not recover the lost analytical sensitivity because of nuclear decay.

6. The liquid scintillation counter's background was slightly higher than normal but within the approved procedure. This procedure is in the pro-cess of being revised with tighter controls for background.

7. November 4,1981, a memorandum to Dr. G. J. Oliver from Mr. G. H. Warriner (Serial: NO-82-H1297) explains the problems and has the recommendations for zooplankton analysis.

t 4